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黄瓜是高产作物,对氮磷钾需要量大,特别是对氮素需要量很大,本试验证明只有在氮磷钾合理配施下,黄瓜才能高产;从试验结果可以看出,只施用磷钾肥而不施氮肥,黄瓜增产不明显,不施氮处理与不施肥处理之间产量差异不大,不施氮处理比不施肥处理亩增产40kg,增产1.5%;在磷钾配施下,亩氮肥施用量25kg时产量最大,当氮肥施用量达到32.5g/亩时,产量反而下降,本试验亩施纯氮32.5kg处理比亩施纯氮25kg处理减产535kg,减产13.9%。从经济效益和产出投入比分析,大棚黄瓜亩产4 500kg,建议在亩施农家肥3 500kg的基础上,每亩施纯氮20~25kg、五氧化二磷8kg、氧化钾20kg。
Cucumber is a high-yielding crop, with a large demand for NPK, especially for nitrogen. The test proved that cucumber can only produce high yield under the rational application of NPK. From the test results, it can be seen that only the application of phosphorus Potash fertilizer without nitrogen fertilizer, cucumber yield is not obvious, no nitrogen fertilizer treatment and no significant difference between the yield, no nitrogen fertilizer than without fertilizer mu yield 40kg, an increase of 1.5%; phosphorus and potassium with the application of mu When the amount of nitrogen fertilizer was 25kg, the yield was the largest. When the amount of nitrogen fertilizer reached 32.5g / mu, the yield decreased. In this experiment, 32.5 kg of pure nitrogen of Mushu treatment was reduced by 535 kg and 13.9% compared with 25 kg of Mushun pure nitrogen. From the analysis of economic benefits and input-output ratio, cucumbers in the greenhouses produced 4 500 kg per mu. It is suggested that 20-25 kg of pure nitrogen per acre, 8 kg of phosphorus pentoxide and 20 kg of potassium oxide should be recommended on the basis of 3 500 kg of farmhouse fertilizer per acre.